if-then-fi structure in Bash Scripting - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

What is the output of this Bash script using if-then-fi?

Consider the following Bash script. What will it print when executed?

Bash Scripting

x=5
if [ $x -gt 3 ]
then
  echo "Greater"
fi

A No output

B Less

C Syntax error

D Greater

💡 Hint

Remember the condition checks if x is greater than 3.

The variable x is 5, which is greater than 3, so the condition is true and the echo command runs.

💻 Command Output

intermediate

What happens if the condition in if-then-fi is false?

What will this Bash script print when executed?

Bash Scripting

x=2
if [ $x -gt 3 ]
then
  echo "Greater"
fi

A Greater

B No output

C Syntax error

D 2

💡 Hint

The condition checks if 2 is greater than 3.

Since 2 is not greater than 3, the condition is false and the echo command inside the if block does not run.

📝 Syntax

advanced

Identify the syntax error in this if-then-fi structure

Which option correctly fixes the syntax error in this Bash script?

Bash Scripting

x=4
if [ $x -gt 3 ]
  echo "Greater"
fi

A Replace [ ] with (( ))

B Remove the fi keyword

C Add 'then' after the if condition

D Add a semicolon after echo

💡 Hint

The if statement needs a 'then' keyword before commands.

The 'then' keyword is required after the if condition to start the block of commands.

🚀 Application

advanced

What is the output of this nested if-then-fi script?

Analyze the script and choose the correct output.

Bash Scripting

x=7
y=10
if [ $x -gt 5 ]
then
  if [ $y -lt 15 ]
  then
    echo "Both conditions met"
  fi
fi

A Both conditions met

B Only first condition met

C Only second condition met

D No output

💡 Hint

Both x and y satisfy their conditions.

x is 7 which is greater than 5, and y is 10 which is less than 15, so both if conditions are true and the echo runs.

🔧 Debug

expert

Why does this if-then-fi script fail to run?

What error will this script produce and why?

Bash Scripting

x=3
if [ $x -gt 2 ]
then
  echo "Yes"
else
  echo "No"

A Syntax error: missing fi keyword

B No output

C Runtime error: invalid condition

D Outputs 'Yes' correctly

💡 Hint

Check if the if block is properly closed.

The script is missing the closing 'fi' keyword which ends the if statement, causing a syntax error.